why is my Ford Mustang S550 (2015-2023) ABS light on and traction control disabled

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery cable to prevent electrical shock.

2. Scan for Error Codes

• Use an OBD-II scanner to check for fault codes.
• Document any codes related to the ABS or traction control systems.

3. Inspect Wheel Speed Sensors

• Remove the wheel corresponding to the sensor showing the error.
• Disconnect the wheel speed sensor connector.
• Clean the sensor and surrounding area with brake cleaner.
• Reconnect the sensor and ensure it is properly seated.

4. Check ABS Control Module and Wiring

• Locate the ABS control module (usually near the master cylinder).
• Inspect all wiring for signs of wear or disconnection.
• Use a multimeter to test for continuity in the wiring harness.

5. Brake Fluid Inspection

• Inspect the brake fluid reservoir for proper fluid level.
• Check for any signs of leakage around brake lines and fittings.
• If fluid is low, top up with the manufacturer-recommended brake fluid.

6. Test ABS Pump and Relay

• Locate the ABS relay in the fuse box.
• Swap the relay with a similar one to check for functionality.
• If necessary, test the ABS pump by applying power directly (ensure proper safety precautions).

7. Reconnect Battery and Clear Codes

• Reconnect the negative battery cable.
• Use the OBD-II scanner to clear any stored codes.
• Test drive the vehicle to check if the ABS light and traction control warning have cleared.